Bump org.jenkins-ci:acceptance-test-harness from 5895.v44475b_ca_0c78 to 5926.v3c2fb_6fa_1973 #1944

Job	Run time
firefox-container / DetailsTabUiTest	11m 31s
chrome-container / DetailsTabUiTest	11m 44s
firefox-container / FreeStyleConfigurationUiTest	10m 43s
chrome-container / FreeStyleConfigurationUiTest	7m 42s
firefox-container / GlobalConfigurationUiTest	11m 30s
chrome-container / GlobalConfigurationUiTest	8m 14s
firefox-container / IssuesColumnUiTest	11m 19s
chrome-container / IssuesColumnUiTest	8m 6s
firefox-container / SnippetGeneratorUiTest	12m 14s
chrome-container / SnippetGeneratorUiTest	12m 18s
firefox-container / TrendChartsUiTest	10m 26s
chrome-container / TrendChartsUiTest	7m 56s
firefox-container / WarningsPluginUiTest	11m 8s
chrome-container / WarningsPluginUiTest	11m 10s
firefox-container / SmokeTests	9m 26s
chrome-container / SmokeTests	9m 29s
	2h 44m 56s

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